var createError = require("http-errors");
var express = require("express");
// var cookieParser = require('cookie-parser');
var logger = require("morgan");
var app = express();
var fs = require("fs");

// view engine setup
// app.set('views', path.join(__dirname, 'views'));
// app.set('view engine', 'pug');

app.use(logger("dev"));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
// app.use(cookieParser());
// app.use(express.static(path.join(__dirname, 'public')));

//allow custom header and CORS
app.all("*", function (req, res, next) {
  res.header("Access-Control-Allow-Origin", "*");
  res.header(
    "Access-Control-Allow-Headers",
    "Content-Type, Content-Length, Authorization, Accept, X-Requested-With"
  );
  res.header("Access-Control-Allow-Methods", "PUT, POST, GET, DELETE, OPTIONS");

  if (req.method === "OPTIONS") {
    res.send(200);
  } else {
    next();
  }
});

// 加载路由
fs.readdirSync("./routes").forEach((filename) => {
  app.use("/", require(`./routes/${filename}`));
});

// catch 404 and forward to error handler
app.use(function (req, res, next) {
  next(createError(404));
});

// error handler
app.use(function (err, req, res) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get("env") === "development" ? err : {};
  // render the error page
  res.status(err.status || 500);
  res.send({});
});

module.exports = app;
